Title (de)

Title (fr)

Publication

Application

Priority

IT MI971799 A 19970728

Abstract (en)

[origin: EP0895335A2] A method for shear-spinning the rotor for a magneto-generator; the rotor comprises a cap-shaped member (10) of metallic material having a bottom (11) and peripheral walls defining a cylindrical ring (12) for circulation of the magnetic flux and a central hub (13) for connection to a drive shaft. The cap member (11, 12) and the central hub (13) are formed in one single piece from a cut disk (20) of malleable metallic material which is plastically cold-shaped by progressive rough-shaping stages to obtain the bottom wall (11) of the cap member, the peripheral ring (12) and the central hub (13) of the rotor by means of rolling or shear-spinning operations against shaping surfaces (21, 22, 25), while keeping the same cut disk (20) of material and/or the blank rotating. <IMAGE>